Longing for what is beyond reach,
The French have a similar expression,
Il veut prendre la lune avec
les dents, meaning he wants to take the Moon
between his teeth, from the old story about the Moon being made of green cheese.

It's all Moonshine:

It's nonsense, imagination, caused by the effects of the
Moon on the mind.

I know as much about it as the Man In The Moon:

I know nothing.

For moonshine in the water:

For nothing.

The Moon is made of green cheese:

A term from the sixteenth century. "Green"
refers not to the color of the moon, but to new immature cheese. Round like the
shape of the moon with a mottled surface and color similar to that of the moon.

Moon about:

To wander listlessly, especially if in love.

Once in a blue Moon:

Very, very, rarely!

To Moon Over:

To think about something or someone.

"To the moon, Alice!"

- Famous threat used by Ralph Cramden (Jackie
Gleason) to his wife Alice.

Minions of the Moon:

Night-time thieves. Also known as 'Moon's men",
and particularly referring to highwaymen.

To find an elephant in the Moon:

Something that seems like a great
discovery, but is not! The phrase came about when a
seventeenth century man proclaimed with much pride that he had discovered
an elephant on the Moon. It turned out that a mouse had crept into his
telescope, and he had mistaken it for an elephant.

The man in the Moon:

Said by some to be a man carrying a bundle of
sticks collected on the Sabbath. Some say he also has a dog with him. Another
version is that the man is actually Cain, with his dog and thorn-bush. The
thorns symbolize the fall, and the dog represents the foul, animal side'of man.
He has also been said to be Endymion, taken to the Moon by Diana.
Also meaning to see human face-like features on the moons surface.

Diana's Worshipers:

A name given to midnight revelers. They come home
by moonlight, and so put themselves under her protection.

Casting beyond the Moon:

To make wild speculations.

Moon Words

Atlantic Moonfish :

Any of several silvery marine fishes with very flat bodies.

Full-Moon Maple:

A small, graceful maple tree, Acer palmatum, of
Korea and Japan, having small, purple flowers. Also called Japanese maple

Honeymoon:

A short holiday taken by a man and a woman immediately after their marriage .

Mock Moon:

A paraselene.

Moonbeam`:

A ray of light from the moon.

Moon-blindness:

A term used to describe night-blindness, also called mooneye.

Mooncalf:

A simpleton, blockhead.

Moon Child:

Someone born under the sign of Cancer.

Moon-drop:

A substance which, in Roman times and later, was supposed
to be shed by the Moon on herbs when an incantation was made:

Moon Face:

Having a very round face.

Moonglade:

The bright reflection of the moon's light on an expanse of water .

Mooning:

A more contemporary phrase, referring to a bare,
moon-like posterior being displayed to passersby.

Moonlighting:

Different meanings in various countries. in the USA it
means having a night job as well as day-time employment; in Australia it
describes riding after cattle by night; in the UK it means illicit work; and in
Ireland it was violence carried out at night.

Moon Pie:

A distinctive southern snack food that consist of two round crisp cookies
with marshmallow filling. Dipped in a chocolate or banana flavored coating.

Moonrakers:

Residents of Wiltshire England were caught raking a pond
in the middle of the night. When asked what they were
doing, they explained that they were trying to rake out the Moon. The
phrase has also come to mean a simpleton.

Moonrat:

Hedgehog.

Moon Shell:

Any of a cosmopolitan family (Naticidae) of carnivorous marine snails having smooth globose shells.